Final answer:
The Deinstitutionalized cohort is the group of individuals with schizophrenia who have spent their adult life in community treatment settings.
Step-by-step explanation:
The group of individuals with schizophrenia who have spent most of their adult life in community treatment settings is known as the Deinstitutionalized cohort. In contrast to the chronically institutionalized cohort, this more recent and younger group has not been spending their lives in institutionalized settings.